At MIX '06, and at the Real World AJAX Seminar, I demoed a mashup application that uses ASP.NET and Atlas to provide a richer experience. The application, called MySearch, lets the user enter a search query, and simultaneously searches several services - books from Amazon, web pages and news from MSN, blogs from Technorati, and images from Flickr. The app shows how easily Atlas and ASP.NET can deliver a mashup with a rich user experience.
Here is a ZIP file containing the source code for that demo.
Installation
Using this application requires a few setup steps, because you need to register with the different service providers, and enter the registration information in the <appSettings> section of web.config.